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HL7 MLLP Connector Release Notes

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The Mule HL7 MLLP connector provides connectivity and parsing functionality for MLLP messages.

Guide: HL7 MLLP Connector Guide
Reference: HL7 MLLP Connector Reference

2.2.1

August 28, 2025

Compatibility

Software Version

Mule

4.1.1 and later

OpenJDK

8, 11, and 17

Fixed Issues

Issue Resolution ID

The MLLP Listener now closes the connections when exceptions are thrown due to network-related issues.

W-18283925

2.2.0

October 16, 2024

What’s New

  • The connector now validates the TLS protocols that are configured to address security vulnerabilities and throws a security exception for protocols that aren’t supported. For more information, see the Throws section on the HL7 MLLP Connector Reference page.

Compatibility

Software Version

Mule

4.1.1 and later

OpenJDK

8, 11, and 17

Fixed Issues

Issue Resolution ID

The MLLP Listener now responds as expected to requests and no longer hangs when the incoming payload isn’t consumed.

W-16822060

2.1.6

January 24, 2024

What’s New

  • This connector is now compatible with Java 17.

Compatibility

Software Version

Mule

4.1.1 and later

OpenJDK

8, 11, and 17

2.1.5

April 1, 2022

Compatibility

Software Version

Mule

4.1.1 and later

Fixed Issues

Issue ID

The Send operation now uses the standard (4 kb) chunk size.

W-10935871

2.1.4

November 12, 2020

Compatibility

Software Version

Mule

4.1.1 and later

Features

Improved logs for debug and trace modes by adding more troubleshooting information at the byte level for inbound and outbound messages and for the state of the MLLP Listener. (CONN-7220)

Fixed Issues

Automatic restart is now enabled when the Listener throws errors. This fixes the issue that caused the Listener to not accept new connections after throwing errors. (SE-17603)

2.1.3

May 18, 2020

Compatibility

Software Version

Mule

4.1.1 and later

Fixed Issues

  • Improved debug level logging to provide more detail. (SE-15711)

2.1.2

December 12, 2019

Compatibility

Software Version

Mule

4.1.1 and later

Fixed Issues

  • Fixed the reconnection strategy implementation for outbound connections (SE-13271)

  • Changed to transmitting data as bytes to avoid any issues with character encoding (SE-13928)

2.1.1

November 13, 2019

Compatibility

Software Version

Mule

4.1.1 and later

Fixed Issues

TLS handling is fixed so that client authentication is optional and only used if a truststore is supplied. (SE-12545).

2.1.0

February 11, 2019

Compatibility

Software Version

Mule

4.1.1 and later

Features

Source configuration allows specifying a connection count, and limiting the number of simultaneous connections to the supplied value. If not configured, the default behavior is to allow any number of simultaneous connections.

Fixed Issues

Closing a connection to the source caused an empty message to be sent through the flow, generally resulting in an exception.

2.0.4

January 11, 2019

Compatibility

Software Version

Mule

4.1.1 and later

Features

The start-of-block character is now configurable.

Fixed Issues

  • The end-of-block character was incorrectly marked as required. It is now optional.

  • Under certain scenarios, all messages received after the first one would fail, with the error message Message does not start with 'MSH'. This was fixed.

2.0.3

November 16, 2018

This update fixes an response issue, and adds the new sendAndReceive operation.

Compatibility

Software Version

Mule

4.1.1 and later

Fixed Issues

Mule 4 HL7 MLLP Connector does not wait for a response after sending a message out. Added new operation sendAndReceive.

2.0.2

October 1, 2018

Compatibility

Software Version

Mule

4.1.1 and later

Fixed Issues

Depending on the way messages were sent to the connector, it would stop receiving requests after the first one. This was fixed.

2.0.1

September 20, 2018

Compatibility

Software Version

Mule

4.1.1 and later

Fixed Issues

ACK like messages weren’t flowing back to sender.

2.0.0

June 18, 2018

Compatibility

Software Version

Mule

4.1.1 and later

Anypoint Studio

7.1 and later

Features

  • Receive Message - The HL7 MLLP connector provides the functionality to receive MLLP messages.

  • Send Message - The HL7 MLLP connector provides the functionality to send MLLP messages.

See Also